Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quantas pole positions conquistaram 0 pontos no México?
 ###Tabelas: CREATE TABLE 2003_squad_statistics (2003_squad_statistics_id AUTO_INCREMENT PRIMARY KEY, Player VARCHAR, Position VARCHAR, Tries INT, Goals INT, Points INT) CREATE TABLE current_situation (current_situation_id AUTO_INCREMENT PRIMARY KEY, Provider VARCHAR, Country VARCHAR, Subscribers (2005) (thousands) INT, Subscribers (2006) (thousands) INT, Growth % VARCHAR) CREATE TABLE by_name (by_name_id AUTO_INCREMENT PRIMARY KEY, Name VARCHAR, Nation VARCHAR, Seasons VARCHAR, Championship titles VARCHAR, Races (Starts) VARCHAR, Poles INT, Wins INT, Podiums INT, Fastest Laps INT, Points VARCHAR) CREATE TABLE singles_40_20–20 (singles_40_20–20_id AUTO_INCREMENT PRIMARY KEY, Outcome VARCHAR, Date INT, Championship VARCHAR, Surface VARCHAR, Opponent in the final VARCHAR, Score in the final VARCHAR) CREATE TABLE character_appearances (character_appearances_id AUTO_INCREMENT PRIMARY KEY, Character VARCHAR, Played by VARCHAR, Season 1 INT, Season 2 INT, Season 3 INT, Season 4 INT, First Appearance VARCHAR)  
SELECT COUNT Poles FROM by_name WHERE Points = 0 AND Nation = Mexico